Optical-illusion urinal partitions

Some rows of urinals are partitioned, more to provide a sense of privacy than to enforce urinal etiquette. The partitions are invariably made of opaque stuff so you can't see through 'em.

I propose making urinal partitions of an optical material that would make it look like your neighbor had a very large penis. That ought to shame the curious peter-peepers into minding their own business.